Vibration based research into temperature influence on circular saw parameters

The study presents the research results of transverse sawing circular saws in conjunction with the oscillatory research of a non-rotating circular saw. It reveals that amplitude-frequency characteristics, resonance frequencies and modes were established and operative heating regimes of the saws were modelled. It was determined that the form of the main modes insignificantly changes when the saw is heated. At the same time heating temperature considerably influences the value of both high and low resonance frequencies, as well as the size of amplitude. During the examination damping coefficient within temperature interval was estimated and both surface and deep hardness of the saw were determined. The study shows that the temperature of the saw significantly changes its surface hardness, but its deep hardness remains less changed. The research results allow forecasting the behaviour of saws during operatio